Electrical warp stop motion



Nov. 17, 1931. A. A. GORDON 1,832,542

ELECTRICAL WARP STOP MOTION Filed Oct. 4, 1929 2 Sheets- Sheet 1 i J/VI/E'A/TOF @4 f 4 /7 55/? 7/7 50FL70/v Nov. 17, 1931. A, A RDON 1,832,542

ELECTRICAL WARP STOP MOTION Filed Oct. 4, 1929 2 Sheets-Sheet 2 qffywz WAN Patented Nov. 17, 1931 um ral) STATES ALBERT A. GORDON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMP'ION &

PATENT oer-ice KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION. OF;

MASSACHUSETTS ELECTRICAL WARP STOP MOTION Application filed October 4, 1929. Serial No. 397,408.

This invention relates to improvements in electrical warp stop motions more particularly for looms and it is the general object of the invention to provide a motion wherein the electrical features are all movable as a unit so that relative movement of the parts is unnecessary and therefore the danger of dis connecting the parts when changing position reduced to a minimum.

It'is frequently d'esirableto change the location of a Warp stop motion in a loom as when the number of harnesses employed is to be increased or decreased.

The usual form of electrical warp stop motion has drop wire guiding bars forming one side of an electrical circuit, and a second bar or rod to engage a fallen drop wire and forming the otherside of the circuit. Theelectromagnet or solenoid included-in the circuit is usually located at some remote part of the loom. As a result of this arrangement, adjustment of-the barsor rods is independent of the electromagnetic device and rupture of'the connections, is likely to follow. It is an important object of my present invention to mount the solenoid or other form. of electro--1nagnetic device on one of the end plates which supports the'contact bars and rods and to mount said plate ona holder so that the warp stop motion may be adjusted as a Whole.

It is frequently desirable to be ableto stop the loom from the rear endthereof without requiring the weaver to go to the frontofthe loom, and it is a further object of my invention to provide a solenoid or other electromagnetic device having a projecting portion readily accessible to the operator to permit immediatestopping from a position behind theloom.

With these and other, objects: in view which will appear as the descriptionproceeds, my inventionresides in thecombination and arrangement of parts hereinafter described and set forth in. the claims. I

'Inthe accompanying drawings, wherein a. convenient embodiment ofmy invention is set forth, I

Fig. 1 is a side elevation of a loom having mv invention app-lied thereto,

m Fig. 2 is a side elevation of'a knock-olf'de portion of the and Fig. 7 is adetailed vertical sectionon' line 1 -7 of Fig. 4.

Referring particularly to Figs. 1 and 2, I have shown a loom framelO having aashipper handle 11 pivoted'thereto as at 12. The handle has contact as at 13 with a rocking lever Mpivoted at 15 to the loom frame. A rearwardly extending rod 16 pivotally connected to the lower part of the lever. 14 controls the shipping mechanism of the loom now shown. A second rearwardly extending rod 17 also connected to the lever 14 is a means by which the lever 14 may be rocked to effect loom stoppage.

The second:rod.17 has mounted onthe rear. end thereof a head 18 with a shoulder 19 positioned to be engaged by. the upright actuator arm 20 of a cam'leverv2l pivotedat 22 .to a stand 23 mounted OIIvlZhG loom frame. A cam 24 cooperates with a second arm- 25 of the lever 21 tocause the latter to rock-as the loom bottom shaft 26 to which the-cam is secured rotates. The stand 23a has pivoted thereto a latch 27 having a: depending; finger 28' to be engaged by a wire-29. The: head 18' has an enlarged portion 30wvhich normally rests on the top of latch 27.

During normal loom operation the latch 27 supports the head 18, but when'warp fault occurs awire ,29 will be given a longitudinal movement to engagethe finger 28 and rock. the latch about its fixed pivot pin 31, whereupon the unsupported head. will fall. and shoulder 19 will move into the path ofthe reciprocating actuator 20. The actuator20; will thereafter move therod 17 readily to effect loomstoppage.

As shown in Figs 1 and 5 l mount on each loolnside near the rear thereof a b *ackct a in which is adjustably secured a bar 3154 having an eye 32 in the upper portion thereof. By means of a set screw 33 an angle rod 34 is secured in the eye 82. Each of the angle rods has a forwardly extending portion 35 which is substantially horizontal and parallel to the path of movement of the warp through the loom. These rods 34 are similar to those which are commonly used in conection with mechanical warp stop motions.

The matter thus far described forms no part of my present invention, the shipping mechanism being usual and the knock-oli' mechanism being shown in my eo-pending application Ser. No. 390,620. Itis not deemed necessary herein to set forth the full operation of the knock-oil, as it is considered suliicient for present purposes to state that longitudinal movement of the wire will effect movement of some element or member of a train of mechanism which will ultimately stop the loom.

In carrying my invention into etl'ect I provide at the right and left hand sides of the loom, as viewed in Fig. 5, end plates 39 and 40 having an upstanding horn 41. Extending between said horns is a metallic rod 42 which is mounted in insulated bushings 43 received by the horns. A screw 44- is threaded thru the bushing on plate 40 and into the rod to afford means for establishing an electrical contact with the latter.

Each end plate has formed therein upwardly opening slots 45 in each of which is mounted an insulated support 46 along the upper opposite edges of which are ribs or flanges 47. The latter engage opposite sides of the end plate to prevent movement of the supports in a direction parallel to rod 42. Contact bars 48 extend between the end plates one end of each bar resting on an insulator on one side of the loom, while the other end is similarly mounted on the opposite side of the loom.

7 As shown herein there are two insulator bars 48 and they are electrically connected together by means of a screw 49 having threaded thereon nuts 50 which engage opposite sides of the bars 48 to establish good connection with bars. Extending across the top of each end plate is a cap 51 of insulating material which engages the bars 48 to re strain upward movement thereof, said cap being held in position by means of screws 52 which extend into the end plate.

The drop wire is of the form shown in dot and dash lines in Fig. 3, having a slot 53 to receive a contact bar 48. The drop wire is further provided with an enlarged head. 54 which is adapted to engage the rod 42 when the drop wire is down, the head being so formed as to insure movement of the drop wire against the corresponding rod 48.

In addition to screw 49 located on the front side of the plate, there is also a second screw 49a which extends through the contact bars 48 to limit longitudinal movement of the bars.

Near the bottom of one of the end plates I provide a pair of insulators 55 each held to the end plate by screw 56. As viewed in Fig. 3 the insulator 55 at the right of the end plate 40 supports a binding post 57, while the insulator on the opposite side supports a binding post 58. Formed as a permanent part of the mechanism is a current conducting wire 59 extending from the binding post 58 to the screw 49, being held to the latter by means of a nut 60 which clamps the wire against one of the nuts 50.

A solenoid 61 supported between the end bars (32 of a bracket 63 secured to one of the end plates by means of screws 64. The bracket may if desired be formed of non-metallic material to conserve the magnetic field, and there is provided a core 65 which is freely s idable through the solenoid. As shown in Fig. 3 the upper end of push wire 29 is secu ed into the left hand end of the core 65 so that movement of the latter will effect movement of the wire.

End plate 40 has formed therewith a hub (36 into which extends a coiled wire 67 which may be made of non-magnetic material and held in position by a set screw 68. The wire 29 extends through the coil wire 67 and acts to transmit the thrust of the core to the finger 28. The lower end of the coiled wire is sccured in any manner to the stand 8a. A. wire 69 extends from the screw 44 threaded into the contact bar 42 to one side of the solenoid and the other side of said solenoid is connected to the binding post 57 by means of wire 70.

Under normal conditions when all the warp threads are intact the drop wires D will be raised and their heads 54 will be out of contacted relation with respect to the rod 42. Under this condition the latch 27 or similar device will be in position to support the head 30. lVhen one of the drop wires falls, however, an electrical contact will be established between the rod 42 and the bar 48 extending through the fallen drop wire. hen this contact is made current will flow through the following circuit battery P, wire 71, binding post 58, wire 59, screw 49, bar 48, fallen drop wire, rod 42, wire 69. solenoid 81, wire 70 binding post 57. wire 72 back to the battery. Current flowing in this circuit will energize the solenoid and the later will move the core 65 from the position shown in Fig. 3 to that shown in Fig. 6 to effect movement of the wire 29. In a manner previously described this movement of the wire 29 will cause loom stoppage.

As previously stated, there are times iilii lie when it is desirable to change the location of bars and drop wires. 7 To eflect this change I provide each end plate with a hub 80. through which extends a set screwSl held 1 tightly against horizontal extension 35 of the rod 34;. Vi hen the motion is to be changed, the set screws 81 are'loosened and the hubs 8O slid to the desired position, after which tightening the set screws will hold the end plates securely in their new position. Fig. 6 shows the plate 40 moved to a position different from that shown in Fig. 3.

Should'the operator be at the rear of the loom and for any reasondecide to stop the loom it will beseen that. the core 65 can be manually moved forwardly thereby causing the latch 27through the wire 29 to unseat the enlarged portion 30 of the head 18 so as to let the shoulder 19 down where a stopping movement will be given by contact with the actuator 20. 7

It is understood that i do not wish to be limited to the wiring of the circuit which is externalwith respect to the end plate 40 supporting the solenoid 61. In other words,.the wires 71 or 72 may if-desired form part of a circuit whichis effective to break the flow of current as soon as the loom comes to rest, as is, set forth in my co-pending application previously referred to. For the sake of simplicity, however, I have omitted such refinements inthe present instance, inasmuch as I am herein concerned with those parts of the device which move with the solenoid rather than any particular circuit which may include them.

From theforegoing it will be seen that I have provided a warp stop motion wherein the electrical features which have contact with the fallen drop wire all move with the solenoid and the core thereof. It will further be seen that the coiled wire through which the push wire extends has the upper end thereof attached rigidly with respectto the solenoid. Having thus described my invention it will be seen that changes and modifications may. be made therein by those skilled in the art without departing from the spirit and scope ofthe invention and I do not wish to be limited to the details herein disclosed, but what I claimis 1. In an electrical warp stop motion for a loom having loomsides and a knock-off, a longitudinally extending electrical Contact member, a second'electrical contact member, an electro-magnetic device'to be electrically connected to the members at warp fault, an element to be moved by the device when the l latter is energized,said element operatively connected 'to the knock-off, and a common positions relatively to the loomsides.

In an electrical warp stop motion fora loom havinga knock-off, a longitudinally extending electrical contact member, a second electrical contact. member, .an electro-magneticdevice to be electrically connected to themembersat warp fault, an element to be moved by the device when the latter is energized, saidelement.operatively connected to the knock-off, a common carrier for the members, device and'element, and a support for the carrier extending substantially parallel to the warp and along which the carrier is movable to assure any oneof a plurality of positions.

3. In a warp stop motion for looms having loomsides, a mechanically operating knockofito eifect loom stoppage when a fault occurs' in the warp, electrically operated elements including contact bars and a solenoid to controlthe knock-off, a'common carrier independentof the loomsides for the electrically operated elements including the bars and solen0id,.the latter all being mounted on the carrier and movable therewith, and a support for the carrier extending substantially parallel to the warp and along which the carrier including the bars and solenoid may be secured in a plurality of positions.

4. In an electrical warp stop motion for a loom having loomsides and a knock-01f, a bank of drop wires and a source of electric energy, twozoppositely charged electric contact elements to be electrically in contact with a fallen drop wire, a carrier independent of the loomsides for the elements insulated from at least one element, an electromagnetic device on the carrier to be electricallyconnected to the elements and source when a drop wire contacts with said elements to efi'ect a change in the magnetic field of said device, and a member operatively connected tothe. knock-off to be moved from normal to knock-off position when the field of the device undergoes a magnetic change.

5. I11 an electrical warp stop motion for a loom having a knock-off, a bank of drop wires and a source of electric energy, a supporting member extending substantially parallel to the warp threads, a carrier mounted on the member and movable therealong to be secured, thereto in any one of a plural ity of positions, a solenoid mounted on and moving with the carrier, a core for the solenoid supported by the carrier and operatively connected to the knock-off, and contact bars electrically connected to the solenoid and source when a drop wire is fallen and mount ed on the carrier, said solenoid, core, drop wires and bars movable along the supporting member as a unit with the carrier.

6. In an electrical warp stop motion for a loom having a knock-off, a bank of drop wires and a source of electric energy, a supporting member fixed to the loom and ex tending substantially parallel to the warp threads, a carrier mounted on the member l Ui) and movable thcrealong to be secured in any one of a plurality of positions along the warp threads, contact bars supported by and movable with the carrier to have electrical engagement with a fallen drop Wire, said bars effective to position the drop wires along the warp, a solenoid secured to the carrier and electrically connected to the bars and source when a drop wire is fallen, a core for the solenoid slidable therein and supported by the carrier, and operative connections between the core and knock-off effective when the solenoid is energized to move the knockoil to effect loom stoppage.

7. In an electrical warp stop motion for a loom having a knock-oft, a bank of drop wires and a source of electric energy, a supporting member fixed to the loom and extending substantially parallel to the warp threads, :1 carrier mounted on the member and movable therealong to be secured in any one of a plurality of positions along the warp threads, contacts bars supported by and movable with the carrier to have electrical engagement with a fallen drop wire, said bars elt'ective to position the drop wires along the warp, a solenoid secured to the carrier and electrically connected to the bars and source when a drop wire is fallen, a core for the solenoid slidable therein and supported by the carrier, and operative connections between the core and knock-oil effective when the solenoid is energized to move the knock-E to effect loom stoppage, said connections including a push wire operatively related to the core and a coiled wire mounted on the carrier and through which the push wire extends.

8. In an electrical warp stop motion for a loom having a knock-oft, a bank of drop wires an d a source of electric energy, a supporting member fixed to the loom and extending substantially parallel to the warp threads, a carrier mounted on the member and movable thercalong to be secured in any one of a plurality of positions along the warp threads, contact bars supported by and movable with the carrier to have electrical engagement with a fallen drop wire, said bars effective to position the drop wires along the warp, a solenoid secured to the carrier and electrically connected to the bars and source when a drop wire is fallen, a core for the solenoid slidable therein and supported by the carrier, and operative connections between the core and knock-off effective when the solenoid is energized to move the knock-off to effect loom stoppage, said connections including a push wire operatively related to the core and a coiled wire mounted on the carrier and through which the push wire extends, the

member fixed to the loom and extending substantially parallel to the warp threads, a carrier mounted on the member and movable therealong to be secured in any one of a plurality of positions along the warp threads, contact bars supported by and movable with the carrier to have electrical engagement with a fallen drop wire, said bars eifective to position the drop wires along the warp, a solenoid secured to the carrier and electrically connected to the bars and source when a drop wire is fallen, a core for the solenoid slidable therein and supported by the carrier, and operative connections between the core and knock-off elfect when the solenoid is energized to move the knock-off to efiect loom stoppage, said connections including wires, one operatively related to the core and the other wrapped around the one attached to the core, said other wire being secured to and moving with the carrier.

10. In an electrical warp stop motion for a loom having a knock-oft, a bank of drop wires and a source of electric energ a sup porting member fixed to the loom and extendin substantially parallel to the warp threads, a carrier mounted on the member and movable therealong to be secured in any one of a plurality of positions along the warp threads, contact bars supported by and movable with the carrier to have electrical engagement with a fallen drop Wire, said bars effective to position the drop wires along the warp, a solenoid secured to the carrier and electrically connected to the bars and source when a drop wire is fallen, a core for the solenoid slidable therein and supported by the carrier, and operative connections between the core and knock-off efiective when the solenoid is energized to move the knockoff to effect loom stoppage, said connections including wires, one operatively related to the core and the other wrapped around the one attached to the core, said other wire being secured to and moving with the carrier, one of said wires being formed of non-magnetic material.

11. In a loom having shipping mechanism at the forward portion thereof, a warp stop motion located on the rear part of the loom, an electro-magnetic device forming part of the stop motion, a member to be attracted to the device at warp fault, and operative connections between the member and shipping mechanism to move the latter when the memher is attracted upon occurrence of warp fault, said member having a portion thereof accessible to be manually moved in the direction in which it moves when attracted by the device, whereby the loom may be stopped from either the front or the rear thereof.

12. In a warp stop motion for looms having loomsides, a mechanically operating knock-off to effect loom stoppage when a fault occurs in the warp, electrically operated elements including contact bars and solenoid to control the knockoff, and a common carrier independent of the loornside for the electrically operated elements including the bars and solenoid, the latter all being mounted on the carrier and movable therewith.

In testimony whereof I have hereunto alffixed my signature.

ALBERT A. GORDON. 

